Evidence: Horseshoe Crab

Each year, half a million Horseshoe Crabs are captured and bled alive to create biomedical technology. According to reports, 10-30% of them die, which is considered better than their statistical fate as fertilizer and bait. (“The Blood Harvest,” Alexis C. Madrigal, The Atlantic.)

IMAGE: Horseshoe Crab Harvest, 1928. Delaware Public Archives, from the upcoming book Evidence of Flossing: What We Leave Behind.